If you create a Python file that imports and uses FastAPI, and run it with the Python from your local environment, it will use your cloned local FastAPI source code.

And if you update that local FastAPI source code when you run that Python file again, it will use the fresh version of FastAPI you just edited.

That way, you don't have to "install" your local version to be able to test every change.

!!! note "Technical Details"

### pip

Após ativar o ambiente como descrito acima:

<div class="termy">

```console
$ pip install -r requirements.txt

---> 100%
```

</div>

Isso irá instalar todas as dependências e seu FastAPI local em seu ambiente local.

#### Usando seu FastAPI local

---> 100%
```

</div>

#### Generate Client Code

To generate the client code you can use the command line application `openapi-ts` that would now be installed.

Because it is installed in the local project, you probably wouldn't be able to call that command directly, but you would put it on your `package.json` file.

It could look like this:

```JSON  hl_lines="7"
{
  "name": "frontend-app",
  "version": "1.0.0",

        └── test_sql_app.py
```

## Create the new database session

First, we create a new database session with the new database.

We'll use an in-memory database that persists during the tests instead of the local file `sql_app.db`.

But the rest of the session code is more or less the same, we just copy it.

```Python hl_lines="8-13"
{!../../../docs_src/sql_databases/sql_app/tests/test_sql_app.py!}
```

!!! tip

</div>

In the output, there's a line with something like:

```hl_lines="4"
INFO:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)
```

That line shows the URL where your app is being served, in your local machine.

### Check it

Open your browser at <a href="http://127.0.0.1:8000" class="external-link" target="_blank">http://127.0.0.1:8000</a>.

You will see the JSON response as:

```JSON

And `threading.local` is not compatible with the new async features of modern Python.

!!! note "Technical Details"

        "top_reviewers": top_reviewers,
        "top_translations_reviewers": top_translations_reviewers,
    }
    github_sponsors = {
        "sponsors": sponsors,
    }
    # For local development
    # people_path = Path("../../../../docs/en/data/people.yml")
    people_path = Path("./docs/en/data/people.yml")
    github_sponsors_path = Path("./docs/en/data/github_sponsors.yml")

    </div>

Il installera toutes les dépendances et votre FastAPI local dans votre environnement local.

#### Utiliser votre FastAPI local

Si vous créez un fichier Python qui importe et utilise FastAPI, et que vous l'exécutez avec le Python de votre environnement local, il utilisera votre code source FastAPI local.

👑 ❔ ⏮️ 🏒 &amp; FastAPI 👈 🏒 ⚓️ 🙇 🔛 <a href="https://docs.python.org/3/library/threading.html#thread-local-data" class="external-link" target="_blank">🐍 `threading.local`</a>, &amp; ⚫️ 🚫 ✔️ 🎯 🌌 🔐 ⚫️ ⚖️ ➡️ 👆 🍵 🔗/🎉 🔗 (🔨 🇸🇲 🔰).

&amp; `threading.local` 🚫 🔗 ⏮️ 🆕 🔁 ⚒ 🏛 🐍.

!!! note "📡 ℹ"
    `threading.local` ⚙️ ✔️ "🎱" 🔢 👈 ✔️ 🎏 💲 🔠 🧵.

    👉 ⚠ 🗝 🛠️ 🏗 ✔️ 1️⃣ 👁 🧵 📍 📨, 🙅‍♂ 🌖, 🙅‍♂ 🌘.

<span style="color: green;">INFO</span>:     Application startup complete.
```

</div>

**Khuyến khích** bạn viết hoặc sao chép code, sửa và chạy nó ở local.

Sử dụng nó trong trình soạn thảo của bạn thực sự cho bạn thấy những lợi ích của FastAPI, thấy được cách bạn viết code ít hơn, tất cả đều được type check, autocompletion,...

---

## Cài đặt FastAPI